Hi Duncan,
I'm with Tom, don't want to be redundant but here's some extra info.
This made me think that the problem is not a 'theshold'. Any thoughts.
Also, if the "bad" number strings are entered at the R command prompt, they
are parsed correctly as the expected number. (not factors)

thanks,
-kevin


this works

0x1.ffadp-1

> df = read.csv("bad1.csv", header=F)
> str(df)
'data.frame':    1 obs. of  1 variable:
 $ V1: num 0.999


but this doesn't

0x1.ffa000000000dp-1

> df = read.csv("bad1.csv", header=F)
> str(df)
'data.frame':    1 obs. of  1 variable:
 $ V1: Factor w/ 1 level "0x1.ffa000000000dp-1 ": 1


this also works, which is one less trailing zero.

0x1.ffa00000000dp-1

>  df = read.csv("bad1.csv", header=F)
> str(df)
'data.frame':    1 obs. of  1 variable:
 $ V1: num 0.999 



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